Measurements of mid-stratospheric formaldehyde from the Odin/SMR instrument
Journal article, 2007
Measurements of mid-stratospheric formaldehyde (H2CO) have been obtained from the limb-viewing sub-millimeter radiometer (SMR) instrument aboard the Odin satellite. The analysis is based upon the only weak (808 -> 707) rotational transition line Of H2CO that can be measured by Odin/SMR at 576.7083150GHz in the band dedicated to the measurement of carbon monoxide (CO). The signal-to-noise ratio is increased by averaging about 1000 spectra within 2-km width vertical layers in the stratosphere over periods from I to 7 days and within 3 latitude bands: Southern Hemisphere (90 degrees S-45 degrees S), tropics (30 degrees S-30 degrees N), and Northern Hemisphere (45 degrees N-90 degrees N). The faint H2CO line can then be retrieved using the standard scientific ground-segment developed for the Odin/SMR measurements. The mid-stratospheric H2CO shows maxima in the tropics for every period considered (January 2006, February 2005, March 2005, and September 2005). The spring-time extra-tropical mid-strato spheric H2CO is more intense than the fall-time extra-tropical amounts. The simulations from the three-dimensional chemical- transport model Reprobus satisfactorily show these general features. (C) 2007 Elsevier Ltd. All rights reserved.
remote
inversion
CLO
HETERODYNE MEASUREMENTS
radiative transfer
formaldehyde
CHLORINE MONOXIDE
SUBMILLIMETER
stratosphere
spectroscopy
MILLIMETER
satellite
RADIOMETER
MODEL
sensing
PERFORMANCE
SATELLITE
OZONE
Author
P. Ricaud
Paul Sabatier University
D. Alexandre
Paul Sabatier University
B. Barret
Paul Sabatier University
E. Le Flochmoen
Paul Sabatier University
E. Motte
Paul Sabatier University
G. Berthet
Centre national de la recherche scientifique (CNRS)
F. Lefévre
Pierre and Marie Curie University (UPMC)
Donal Murtagh
Chalmers, Department of Radio and Space Science
Journal of Quantitative Spectroscopy and Radiative Transfer
0022-4073 (ISSN)
Vol. 107 1 91-104Subject Categories
Physical Sciences
DOI
10.1016/j.jqsrt.2007.01.058